a better name for “object-sensitivity” might have been “allocation-site sensitivity”
What is the relationship between taint tracking vs. DFA?
Taint tracking is a subset of DFA
DFA vs. DFG vs. DDA vs. DDG?
Data Flow Analysis's input is a (i)CFG, and its output is for each program point in the (i)CFG, the pre-state and post-state in an abstract domain.
Data Flow Graph are sometimes used in a context outside the program analysis. It is basically a way to represent a value-oriented computation process (i.e. the normal program concepts such as variables and functions are typically not inside such DFG).
Data Dependency Analysis is a subset of Dependency Analysis, which is about dependency between statement pair. Again, it is mostly used in compiler domain, outside program analysis.
Data Dependency Graph is just the output of the DDA.